On Sat 2015-08-15 (08:02), Anand Jain wrote: > First of all there is a known issue in handling multiple paths / > instances of the same device image in btrfs. Fixing this caused > regression earlier. And my survey > [survey] BTRFS_IOC_DEVICES_READY return status > almost told me not to fix the bug. I have subscribed to this list this week, I am a newbie :-) > > There is now a new behaviour: after the btrfs mount, I can see shortly the > > wrong raw device /dev/sde and a few seconds later there is the correct > > /dev/drbd3 : > > yep possible. but it does not mean that btrfs kernel is using the new > path its just a reporting (bug). What is the reporting bug: /dev/sde or /dev/drbd3? > > root@toy02:/etc# btrfs filesystem show -m > > Label: data uuid: 411af13f-6cae-4f03-99dc-5941acb3135b > > Total devices 2 FS bytes used 109.56GiB > > devid 3 size 1.82TiB used 63.03GiB path /dev/drbd2 > > devid 4 size 1.82TiB used 63.03GiB path /dev/drbd3 > > > > Still, the kernel sees 3 instead of (really) 2 HGST drives: > > > > root@toy02:/etc# hdparm -I /dev/sdb | grep Number: > > Model Number: HGST HUS724020ALA640 > > Serial Number: PN2134P5G2P2AX > > > > root@toy02:/etc# hdparm -I /dev/sde | grep Number: > > Model Number: HGST HUS724020ALA640 > > Serial Number: PN2134P5G2P2AX > > This is important to know but not a btrfs issue. Do you have multiple > host paths reaching this this device with serial # PN2134P5G2P2AX ? root@toy02:~# find /dev -ls | grep PN2134P5G2P2AX 14354 0 lrwxrwxrwx 1 root root 17 Aug 14 09:00 /dev/drbd/by-disk/disk/by-id/ata-HGST_HUS724020ALA640_PN2134P5G2P2AX -> ../../../../drbd3 13640 0 lrwxrwxrwx 1 root root 9 Aug 13 16:25 /dev/disk/by-id/ata-HGST_HUS724020ALA640_PN2134P5G2P2AX -> ../../sdb root@toy02:~# find /dev -ls | grep sdb 7417 0 brw-rw---- 1 root disk Aug 13 16:25 /dev/sdb 12366 0 lrwxrwxrwx 1 root root 9 Aug 13 16:25 /dev/disk/by-path/pci-0000:08:00.0-sas-0x1221000002000000-lun-0 -> ../../sdb 13641 0 lrwxrwxrwx 1 root root 9 Aug 13 16:25 /dev/disk/by-id/wwn-0x5000cca24ec137db -> ../../sdb 13640 0 lrwxrwxrwx 1 root root 9 Aug 13 16:25 /dev/disk/by-id/ata-HGST_HUS724020ALA640_PN2134P5G2P2AX -> ../../sdb 12356 0 lrwxrwxrwx 1 root root 6 Aug 13 16:25 /dev/block/8:16 -> ../sdb root@toy02:~# find /dev -ls | grep sde 13353 0 brw-rw---- 1 root disk Aug 13 16:24 /dev/sde 15725 0 lrwxrwxrwx 1 root root 9 Aug 13 16:25 /dev/disk/by-uuid/411af13f-6cae-4f03-99dc-5941acb3135b -> ../../sde 15724 0 lrwxrwxrwx 1 root root 9 Aug 13 16:25 /dev/disk/by-label/data -> ../../sde 9394 0 lrwxrwxrwx 1 root root 9 Aug 13 16:24 /dev/disk/by-path/pci-0000:08:00.0-scsi-0:1:2:0 -> ../../sde 9387 0 lrwxrwxrwx 1 root root 6 Aug 13 16:24 /dev/block/8:64 -> ../sde -- Ullrich Horlacher Server und Virtualisierung Rechenzentrum IZUS/TIK E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx Universitaet Stuttgart Tel: ++49-711-68565868 Allmandring 30a Fax: ++49-711-682357 70550 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ REF:<55CE81A6.5070305@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
